.main{
    margin: 10px;
    border: 1px solid #cccccc;
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 14px;
}
.main ul li{
    padding: 10px 12px ;
    background: url("../image/jiantou.png") no-repeat 99%;
    background-size: 5%;
    border-bottom: 1px solid #cccccc;
}